Choose the word which is different from the rest.

The answer is C. Sultry.

The other four words (A, B, D, and E) all describe temperature. Sultry, on the other hand, describes a type of weather that is hot and humid.

Cool is a word that describes a temperature that is below average. Warm is a word that describes a temperature that is above average. Hot is a word that describes a temperature that is very high. Humid is a word that describes a high level of moisture in the air.

Sultry weather is often described as being oppressive and uncomfortable. It can be caused by a combination of high temperatures and high humidity. Sultry weather can make it difficult to breathe and can lead to dehydration.